Does TonCut have a warehouse feature?

Unfortunately TonCut does not have such a feature, although this does not mean it's impossible.

To use TonCut as a warehouse, after the optimization process has finished press the Save button (it's located at left bottom corner of the screen), and select Pieces and sheets leftovers and Save waste as sheets. Now press Save and select/type name for the warehouse file. It is best to save it in subsequent files, for example: warehouse001, warehouse002, etc. This way you can always return to previous versions.

Now you have all the remaining sheets and pieces in a file. Additionally, reusable waste is also stored as sheets.

Now you can load the file (for example: warehouse001, warehouse002, etc.) and enter new orders (pieces) and/or refill the stock.

After the next optimization save again pieces and sheets leftovers to a file, for example: warehouse002, warehouse003, etc.